#define _CRT_SECURE_NO_WARNINGS 520
#include<stdio.h>

int main()
{
	int n = 0;
	char arr[21] = { 0 };
	while ((scanf("%d", &n)) != EOF)
	{
		for (int i = 0; i < n; i++)
		{
			for (int j = 0; j < n; j++)
			{
				arr[j] = ' ';

			}
			arr[n] = '\0';
			arr[i] = '*';
			arr[n - i - 1] = '*';
			printf("%s\n", arr);
		}
	}
	return 0;
}